EP3725556A1 - Luftreifen - Google Patents

Luftreifen Download PDF

Info

Publication number
EP3725556A1
EP3725556A1 EP18889421.6A EP18889421A EP3725556A1 EP 3725556 A1 EP3725556 A1 EP 3725556A1 EP 18889421 A EP18889421 A EP 18889421A EP 3725556 A1 EP3725556 A1 EP 3725556A1
Authority
EP
European Patent Office
Prior art keywords
groove
tire
internal
branch
auxiliary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP18889421.6A
Other languages
English (en)
French (fr)
Other versions
EP3725556B1 (de
EP3725556A4 (de
Inventor
Tatsuya Tomida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Publication of EP3725556A1 publication Critical patent/EP3725556A1/de
Publication of EP3725556A4 publication Critical patent/EP3725556A4/de
Application granted granted Critical
Publication of EP3725556B1 publication Critical patent/EP3725556B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/0304—Asymmetric patterns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/032—Patterns comprising isolated recesses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/04—Tread patterns in which the raised area of the pattern consists only of continuous circumferential ribs, e.g. zig-zag
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1236—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special arrangements in the tread pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1259—Depth of the sipe
    • B60C11/1263—Depth of the sipe different within the same sipe
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1272—Width of the sipe
    • B60C11/1281—Width of the sipe different within the same sipe, i.e. enlarged width portion at sipe bottom or along its length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
    • B60C11/1307—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls
    • B60C11/1315—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping with special features of the groove walls having variable inclination angles, e.g. warped groove walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • B60C19/002—Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0341—Circumferential grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0341—Circumferential grooves
    • B60C2011/0353—Circumferential grooves characterised by width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0341—Circumferential grooves
    • B60C2011/0355—Circumferential grooves characterised by depth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0374—Slant grooves, i.e. having an angle of about 5 to 35 degrees to the equatorial plane
    • B60C2011/0376—Slant grooves, i.e. having an angle of about 5 to 35 degrees to the equatorial plane characterised by width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0374—Slant grooves, i.e. having an angle of about 5 to 35 degrees to the equatorial plane
    • B60C2011/0379—Slant grooves, i.e. having an angle of about 5 to 35 degrees to the equatorial plane characterised by depth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339—Grooves
    • B60C2011/0381—Blind or isolated grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03—Tread patterns
    • B60C2011/0337—Tread patterns characterised by particular design features of the pattern
    • B60C2011/0386—Continuous ribs
    • B60C2011/0388—Continuous ribs provided at the equatorial plane

Definitions

  • the present disclosure relates to a pneumatic tire.
  • a pneumatic tire In a pneumatic tire, it is required to reduce noise during vehicle running and improve quietness.
  • various tires have been suggested in which vehicle exterior noise such as air column resonance sound (often observed in a range from about 800 to 1200 Hz in a passenger vehicle) generated from a circumferential main groove provided in a tread surface of a tire is reduced by a resonator (a so-called Helmholtz resonator) comprising an air chamber portion and a narrowed neck portion (e.g., PTL 1).
  • a resonator a so-called Helmholtz resonator
  • a Helmholtz resonator is provided in a land portion of a tread, a rigidity distribution of the land portion tends to be nonuniform, and uneven wear easily occurs in the tread. Consequently, it is desired that the uneven wear of the tread is suppressed while reducing air column resonance sound.
  • an object of the present disclosure is to provide a tire in which uneven wear in a tread can be suppressed while reducing air column resonance sound.
  • a tire of the present disclosure is a tire including, in a tread surface, a plurality of land portions partitioned by a circumferential main groove extending continuously in a tire circumferential direction, on at least one side in a tire width direction, and comprising, in an internal land portion located in a vehicle-installed inside half portion to a tire equatorial plane among the plurality of land portions, an internal resonator including a first auxiliary groove that terminates in the internal land portion, and a first branch groove that communicates between the first auxiliary groove and the circumferential main groove, wherein in the first branch groove, a hidden groove having an opening width in the tread surface that is smaller than a groove width of a groove bottom is provided adjacent to the first auxiliary groove.
  • the vehicle-installed inside half portion and “a vehicle-installed outside half portion” refer to outside and inside half portions of a vehicle in the tire width direction to the tire equatorial plane, when the tire is installed in the vehicle.
  • the tread surface means an outer circumferential surface over an entire circumference of the tire, which comes in contact with a road surface when the tire assembled to a rim and filled with a predetermined internal pressure is rolled in a state of being loaded with a maximum load
  • a tread ground contact edge means an edge of the tread surface in the tire width direction
  • the opening width", “the groove width” or the like of each of various grooves refers to a width measured along a direction orthogonal to an extending direction of the groove in the following reference state.
  • a groove depth” and “a volume” or the like of each groove refer to a depth and a volume that are also measured in the following reference state.
  • the reference state indicates a state where the tire is assembled to the rim, filled with the internal pressure and unloaded.
  • rim indicates an approved rim (a measuring rim in Standards Manual of ETRTO, and a design rim in Year Book of TRA) in an applicable size described or to be described in future in an industrial standard effective in a district where the tire is produced and used, for example, JATMA Year Book of JATMA (the Japan Automobile Tyre Manufacturers Association) in Japan, Standards Manual of ETRTO (The European Tyre and Rim Technical Organization) in Europe, Year Book of TRA (The Tire and Rim Association, Inc.) in the U.S. or the like (that is, the above "rim” also includes a size that can be included in the above industrial standard in future, in addition to the existing size.
  • JATMA Year Book of JATMA the Japan Automobile Tyre Manufacturers Association
  • ETRTO European Tyre and Rim Technical Organization
  • TRA The Tire and Rim Association, Inc.
  • a prescribed internal pressure refers to an air pressure (a maximum air pressure) corresponding to a maximum load capability of a single wheel in an applicable size and ply rating described in Year Book of JATMA described above, or the like.
  • the prescribed internal pressure having a size that is not described in the above industrial standard refers to an air pressure (the maximum air pressure) corresponding to the maximum load capability prescribed for each vehicle to which the tire is mounted.
  • the maximum load refers to a load corresponding to the above maximum load capability. Note that air described herein can be replaced with an inert gas such as a nitrogen gas, or the like.
  • uneven wear in a tread can be suppressed while reducing air column resonance sound.
  • FIG. 1 is a partial developed view illustrating a tread surface 2 of a tire 1 according to an embodiment of the present disclosure.
  • the tire 1 of this embodiment comprises a carcass including a radial structure toroidally extending between bead portions, a belt disposed outside the carcass of a tread portion in a tire radial direction, and a tread rubber disposed outside the belt in the tire radial direction to form the tread surface 2.
  • the tire 1 comprises, in the tread surface 2, two internal circumferential main grooves 31a, 32a extending in a vehicle-installed inside half portion HA (in FIG. 1 , a paper surface left side) to a tire equatorial plane CL, and two external circumferential main grooves 31b, 32b extending in a vehicle-installed outside half portion HB (in FIG. 1 , a paper surface right side) to the tire equatorial plane CL.
  • the internal circumferential main grooves 31a, 32a and the external circumferential main grooves 31b, 32b linearly extend continuously in a tire circumferential direction.
  • groove widths of the external circumferential main grooves 31b, 32b are equal to each other, and a total of the groove widths of the external circumferential main grooves 31b, 32b is smaller than a total of groove widths of the internal circumferential main grooves 31a, 32a. Furthermore, the groove widths of the internal circumferential main grooves 31a, 32a are different from each other, and the groove width of the internal circumferential main groove 32a on a tire ground contact edge TE side is larger than the groove width of the internal circumferential main groove 31a on a tire equatorial plane CL side, and is maximum among circumferential main grooves 3.
  • the circumferential main grooves 3 have an extending form as described above, and the groove widths of the circumferential main grooves 3 have a magnitude relation as described above.
  • the circumferential main grooves 3 may have a zigzag-shaped or wavy-shaped extending form.
  • the groove widths of the external circumferential main grooves 31b, 32b may be different from each other, and the groove widths of the internal circumferential main grooves 31a, 32a may be equal to each other.
  • the tire includes, in the tread surface 2, a plurality of (in the present embodiment, five) land portions 4 partitioned by the (in the present embodiment, four) circumferential main grooves 3 continuously extending in the tire circumferential direction on at least one side in a tire width direction, as illustrated in FIG. 1 .
  • the tire comprises a central land portion 41 partitioned by the internal circumferential main groove 31a and the external circumferential main groove 31b adjacent to each other via the tire equatorial plane CL, an internal intermediate land portion 42a partitioned by two internal circumferential main grooves 31a, 32a, an external intermediate land portion 42b partitioned by two external circumferential main grooves 31b, 32b, an internal shoulder land portion 43a partitioned by a vehicle-installed inside tread ground contact edge TE (hereinafter, also referred to simply as “the tread ground contact edge TE") and the internal circumferential main groove 32a on the tread ground contact edge TE side, and an external shoulder land portion 43b partitioned by a vehicle-installed outside tread ground contact edge TE (hereinafter, also referred to simply as "the tread ground contact edge TE”) and the external circumferential main groove 32b on the tread ground contact edge TE side.
  • the tread ground contact edge TE vehicle-installed outside tread ground contact edge TE
  • the tire 1 includes, in the tread surface 2, the central land portion 41 including the tire equatorial plane CL, two internal land portions (the internal intermediate land portion 42a and the internal shoulder land portion 43a) located in the vehicle-installed inside half portion HA, and two external land portions (the external intermediate land portion 42b and the external shoulder land portion 43b) located in the vehicle-installed outside half portion HB.
  • each of the plurality of land portions 4 is a rib-like land portion extending continuously in the tire circumferential direction, but in the tire of the present disclosure, one or more of the plurality of land portions 4 may be a block-shaped land portion or the like.
  • the tire 1 comprises an internal resonator 5 (in an illustrated example, a Helmholtz resonator) in the internal land portion (in the present embodiment, the internal intermediate land portion 42a) located in the vehicle-installed inside half portion HA to the tire equatorial plane CL among the above plurality of land portions 4.
  • an internal resonator 5 in an illustrated example, a Helmholtz resonator
  • the internal land portion in the present embodiment, the internal intermediate land portion 42a located in the vehicle-installed inside half portion HA to the tire equatorial plane CL among the above plurality of land portions 4.
  • the internal resonator 5 includes a first auxiliary groove 51 that terminates in the internal intermediate land portion 42a, and a first branch groove 52 that communicates between the first auxiliary groove 51 and the circumferential main groove 3 (in the present embodiment, a first branch groove 52a that communicates between the first auxiliary groove 51 and the internal circumferential main groove 32a on the tread ground contact edge TE side, and a first branch groove 52b that communicates between the first auxiliary groove 51 and the internal circumferential main groove 31a on the tire equatorial plane CL side).
  • the first branch groove 52a is provided adjacent to an end portion 51Ea of the first auxiliary groove 51 (in FIG. 1 , a paper surface upper side) on one side in the tire circumferential direction
  • the first branch groove 52b is provided adjacent to an end portion 51Eb of the first auxiliary groove 51 on the other side (in FIG. 1 , a paper surface lower side) in the tire circumferential direction. That is, in this example, one end of the first branch groove 52a is opened in the internal circumferential main groove 32a on the tread ground contact edge TE side, and the other end of the first branch groove 52a is opened in the end portion 51Ea of the first auxiliary groove 51 on one side in the tire circumferential direction.
  • one end of the first branch groove 52b is opened in the internal circumferential main groove 31a on the tire equatorial plane CL side, and the other end of the first branch groove 52b is opened in the end portion 51Eb of the first auxiliary groove 51 on the other side in the tire circumferential direction.
  • the internal resonator 5 includes two first branch grooves 52a, 52b, and accordingly the first auxiliary groove 51 communicates with two internal circumferential main grooves 31a, 32a.
  • the tire of the present disclosure may include a configuration where the internal resonator only includes one first branch groove, or a configuration where the internal resonator includes two first branch grooves and two branch grooves communicate with one internal circumferential main groove.
  • the tire of the present disclosure may include a configuration where the internal resonator includes three, four or more first branch grooves.
  • the first branch grooves 52a, 52b may be provided in a portion other than the end portions 51Ea, 51Eb of the first auxiliary groove 51 in the tire circumferential direction, for example, a portion adjacent to a central portion of the first auxiliary groove 51 in the tire circumferential direction.
  • a groove volume of the first auxiliary groove 51 is larger than a groove volume of one of two first branch grooves 52a, 52b connected to the first auxiliary groove 51. Furthermore, an opening area of the first auxiliary groove 51 to the tread surface 2 is larger than an opening area of one of two first branch grooves 52a, 52b to the tread surface 2, the first branch grooves being connected to the first auxiliary groove 51.
  • FIG. 2 is a partial enlarged view of the tread surface 2 illustrated in FIG. 1 , and illustrates the resonator 5 and a peripheral part of the resonator 5 in an enlarged manner.
  • a hidden groove 52aH having an opening width in the tread surface 2 that is smaller than a groove width of a groove bottom is provided adjacent to the first auxiliary groove 51, in the first branch groove 52 (in the present embodiment, one first branch groove 52a).
  • FIG. 2 illustrates a groove wall of the hidden groove 52aH with a broken line.
  • the first branch groove 52a includes one bent portion while extending, and comprises a first extending portion 52a1 extending approximately along an extending direction of the first auxiliary groove 51, and a second extending portion 52a2 extending in an extending direction different from that of the first extending portion.
  • the first extending portion 52a1 is connected to the first auxiliary groove 51
  • the second extending portion 52a2 is connected to the internal circumferential main groove 32a.
  • the hidden groove 52aH is provided only in the first extending portion 52a1. Furthermore, the hidden groove 52aH is provided over an extending length of the first extending portion 52a1.
  • first branch groove 52a in the present embodiment includes one bent portion while extending.
  • the first branch groove 52a may be formed to extend (in a linear or arched manner) without including the bent portion, formed to include two or more bent portions while extending, or formed otherwise.
  • the hidden groove 52aH provided in the first extending portion 52a1 of the first branch groove 52a is provided continuously with an end portion region of the first auxiliary groove 51. That is, a hidden groove 51H is also provided in a peripheral region of the end portion 51Ea of the first auxiliary groove 51 on one side in the tire circumferential direction.
  • the hidden groove may include a configuration where the hidden groove is provided in an entire region of the first auxiliary groove 51 or only in the first branch groove 52a.
  • a portion in which an opening width in the tread surface 2 is constant is the first branch groove 52a.
  • an opening width of the first branch groove changes along an extending direction of the first branch groove it is considered that a portion having an opening width that is less than 20% of a maximum width of the first auxiliary groove is the first branch groove.
  • FIGS. 3 to 5 are cross-sectional views of the internal resonator 5. That is, FIG. 3 is a cross-sectional view along the a-a line of FIG. 2 , FIG. 4 is a cross-sectional view along the b-b line of FIG. 2 , and FIG. 5 is a cross-sectional view along the c-c line of FIG. 2 . More specifically, FIG. 3 is a cross-sectional view of a surface of the first branch groove 52a that is orthogonal to the extending direction of the first branch groove 52a, and FIGS. 4, 5 are cross-sectional views illustrating a surface of the first auxiliary groove 51 that is orthogonal to the extending direction of the first auxiliary groove 51.
  • an opening width W52aH in the tread surface 2 is smaller than a groove depth D52aH, and smaller than a groove width W52aHB in a groove bottom 52aHB.
  • an opening width W51H in the tread surface 2 is smaller than a groove depth D51H, and smaller than a groove width W51HB in a groove bottom 51HB.
  • an opening width W51 in the tread surface 2 is smaller than a groove depth D51, and larger than or equal to a groove width W51B in a groove bottom 51B.
  • the opening width W51H in the tread surface 2 is smaller than the opening width W51 of the first auxiliary groove 51 in the tread surface 2 of the portion other than the end portion region.
  • the groove depth D51H of the end portion region of the first auxiliary groove 51 including the hidden groove 51H is larger than the groove depth D51 of the first auxiliary groove 51 in the portion other than the end portion region.
  • a groove depth of the first branch groove 52a is maximum in the hidden groove 52aH.
  • the groove depth of the first branch groove 52a may be constant.
  • the hidden groove 52aH in the first branch groove 52a comprises an opening side portion 52aHa having a groove width maintained on an inner side in the tire radial direction (a groove width direction) in the same manner as in the opening width W52aH in the tread surface 2, and a groove bottom side portion 52aHb having a groove width that is larger than the opening width W52aH and continuous in the groove depth direction, in order from a tread surface 2 side in cross-sectional view of the surface of the first branch groove 52a that is orthogonal to the extending direction of the first branch groove as illustrated in FIG. 3 .
  • the opening side portion 52aHa has a constant groove width, while the groove width of the groove bottom side portion 52aHb of the hidden groove 52aH gradually increases to a vicinity of a middle of the groove bottom side portion 52aHb in a region from the tread surface 2 side toward a groove bottom 52aHB side, and then gradually decreases or is maintained constant in a region from the vicinity of the middle of the groove bottom side portion 52aHb to the groove bottom 52aHB. That is, the groove bottom side portion 52aHb in this example has a deformed hexagonal shape in cross-sectional view of the surface that is orthogonal to the extending direction of the first branch groove 52a.
  • the groove bottom side portion 52aHb of the hidden groove 52aH provided in the first branch groove 52a may have, in cross-sectional view, a shape (e.g., a circular, elliptic or rhombic shape) in which the groove width gradually increases and gradually decreases from the tread surface 2 side toward a groove bottom 52aHB side, a shape (e.g., a quadrangular shape) in which the groove width is constant from the tread surface 2 side toward the groove bottom 52aHB side, a shape (e.g., a triangular or semicircular shape) in which the groove width always gradually increases from the tread surface 2 toward the groove bottom 52aHB side, or the like.
  • a shape e.g., a circular, elliptic or rhombic shape
  • a shape e.g., a quadrangular shape
  • the groove width is constant from the tread surface 2 side toward the groove bottom 52aHB side
  • a shape e.g., a triangular or semicircular shape
  • the internal resonator of the present disclosure may include a configuration where the hidden groove 52aH provided in the first branch groove 52a does not include the opening side portion 52aHa. That is, the hidden groove 52aH may have a configuration where the groove width gradually increases from the tread surface 2 side toward the groove bottom 52aHB side, and the opening width W52aH in the tread surface 2 is smaller than the groove width W52aHB on the groove bottom 52aHB side.
  • FIG. 6 is a cross-sectional view along the d-d line of FIG. 2 , and here illustrates a developed cross section along opening centers of the first auxiliary groove 51 and the first branch groove 52a.
  • the groove depth gradually decreases from a first branch groove 52b side (a paper surface right side) toward a first branch groove 52a side (a paper surface left side), and the first auxiliary groove 51 includes a groove deepest portion 51Dp in which a groove depth of the first auxiliary groove 51 is maximum, in at least a central portion of the first auxiliary groove 51 in the extending direction.
  • the groove depth of the first auxiliary groove 51 is minimum in a portion adjacent to the first branch groove 52a. That is, in the first auxiliary groove 51, the groove depth is minimum between the groove deepest portion 51Dp disposed in at least the central portion of the first auxiliary groove 51 in the extending direction and the first branch groove 51a connected to the first auxiliary groove 51, in developed view of the cross section along the extending direction of the first auxiliary groove 51. According to this configuration, uneven wear in a tread can be more reliably suppressed while more effectively reducing air column resonance sound.
  • the first auxiliary groove 51 locally deepens in the groove deepest portion 51Dp.
  • the tire of the present disclosure may include a configuration where the groove depth of the first auxiliary groove gradually increases from the end portion of the first auxiliary groove on one side in the tire circumferential direction and the end portion thereof on the other side toward the central portion of the first auxiliary groove in the extending direction. In this case, it is considered that a portion having a groove depth in excess of twice an average depth of the first auxiliary groove 51 is the groove deepest portion 51Dp.
  • the tire 1 comprises an external resonator 6 (in an illustrated example, a Helmholtz resonator) in an external land portion (in the present embodiment, the external intermediate land portion 42b) located in the vehicle-installed outside half portion HB to the tire equatorial plane CL, among the plurality of land portions 4.
  • an external resonator 6 in an illustrated example, a Helmholtz resonator
  • an external land portion in the present embodiment, the external intermediate land portion 42b located in the vehicle-installed outside half portion HB to the tire equatorial plane CL, among the plurality of land portions 4.
  • the external resonator 6 includes a second auxiliary groove 61 that terminates in the external intermediate land portion 42b, and a second branch groove 62 that communicates between the second auxiliary groove 61 and the circumferential main groove 3 (in the present embodiment, a second branch groove 62a that communicates between the second auxiliary groove 61 and the vehicle-installed outside circumferential main groove 32b, and a second branch groove 62b that communicates between the second auxiliary groove 61 and the circumferential main groove 31b on the tire equatorial plane CL side).
  • the second branch groove 62a is provided adjacent to a central portion of the second auxiliary groove 61 in the tire circumferential direction
  • the second branch groove 62b is provided adjacent to an end portion of the second auxiliary groove 61 on one side (in FIG. 1 , a paper surface upper side) in the tire circumferential direction. That is, in this example, one end of the second branch groove 62a is opened in the external circumferential main groove 32b on the tread ground contact edge TE side, and the other end of the second branch groove 62a is opened in the central portion of the second auxiliary groove 61 in the tire circumferential direction.
  • one end of the second branch groove 62b is opened in the external circumferential main groove 31b on the tire equatorial plane CL side, and the other end of the second branch groove 62b is opened in the end portion of the second auxiliary groove 61 on one side in the tire circumferential direction.
  • the external resonator 6 includes two second branch grooves 62a, 62b, and the second auxiliary groove 61 accordingly communicates with two external circumferential main grooves 31b, 32b.
  • the tire of the present disclosure may include a configuration where the external resonator only includes one second branch groove, or a configuration where the external resonator includes two second branch grooves and two branch grooves communicate with one external circumferential main groove.
  • the tire of the present disclosure may include a configuration where the external resonator includes three, four or more second branch grooves.
  • both of the second branch grooves 62a, 62b may be provided adjacent to the end portion of the second auxiliary groove 61 in the tire circumferential direction, and both of the second branch grooves 62a, 62b may be provided adjacent to the central portion of the second auxiliary groove 61 in the tire circumferential direction.
  • a groove volume of the second auxiliary groove 61 is larger than a groove volume of one of two second branch grooves 62a, 62b connected to the second auxiliary groove 61. Furthermore, an opening area of the second auxiliary groove 61 to the tread surface 2 is larger than an opening area of one of two second branch grooves 62a, 62b connected to the second auxiliary groove 61, to the tread surface 2.
  • either of the second branch grooves 62a, 62b is not provided with a hidden groove in which an opening width in the tread surface 2 is smaller than a groove width of a groove bottom.
  • at least one of the second branch grooves 62a, 62b may be provided with the hidden groove in the same manner as in the internal resonator 5.
  • a length L6 of the external resonator 6 in the tire circumferential direction is smaller than a length L5 of the internal resonator 5 in the tire circumferential direction.
  • a plurality of internal resonators 5 described above are arranged via a constant space in the tire circumferential direction
  • a plurality of external resonators 6 described above are arranged via a constant space in the tire circumferential direction.
  • a volume of the second auxiliary groove 61 of the external resonator 6 is smaller than a volume of the first auxiliary groove 51 of the internal resonator 5, and a number of the external resonators 6 to be arranged in the tire circumferential direction is larger than a number of the internal resonators 5 to be arranged in the tire circumferential direction.
  • an arrangement pitch of the external resonators 6 in the tire circumferential direction is smaller than an arrangement pitch of the internal resonators 5 to be arranged in the tire circumferential direction.
  • an average pitch in the tire circumferential direction is the arrangement pitch of the internal resonators 5 and the external resonators 6.
  • the internal resonators 5 adjacent in the tire circumferential direction are not in mutually overlapping positions in the tire circumferential direction, but the external resonators 6 adjacent in the tire circumferential direction are in the mutually overlapping positions in the tire circumferential direction.
  • the hidden groove 52aH of the first branch groove 52a of the internal resonator 5 overlaps with the second auxiliary groove 61 of the external resonator 6 in the tire width direction. More specifically, in the illustrated example, an entire extending region of the hidden groove 52aH of the first branch groove 52a of the internal resonator 5 in the tire circumferential direction overlaps with an extending region of the first auxiliary groove 62 of the external resonator 6 in the tire circumferential direction, in the tire width direction. Especially in the tire 1, the hidden groove 52aH of the first branch groove 52a of the internal resonator 5 overlaps with a maximum width position of the second auxiliary groove 61 of the external resonator 6 in the tire circumferential direction.
  • the tire 1 comprises the internal resonator 5 including the first auxiliary groove 51 that terminates in the internal intermediate land portion 42a, and the first branch groove 52 (in the present embodiment, the first branch grooves 52a, 52b) that communicates between the first auxiliary groove 51 and the circumferential main groove 3 (in the present embodiment, the internal circumferential main grooves 31a, 32a), in the internal land portion (in the present embodiment, the internal intermediate land portion 42a) located in the vehicle-installed inside half portion HA to the tire equatorial plane CL, among the plurality of land portions 4 provided in the tread surface 2. Consequently, air column resonance sound generated in the internal circumferential main grooves 31a, 32a can be reduced by the internal resonator 5.
  • the hidden groove 52aH having the opening width in the tread surface 2 that is smaller than the groove width of the groove bottom is provided adjacent to the first auxiliary groove 51.
  • the opening width W52aH in the tread surface 2 is smaller than the groove width W52aHB of the groove bottom 52aHB. Consequently, excessive decrease in rigidity of the land portion due to the internal resonator 5 provided in the tread surface 2 can be suppressed, and hence the uneven wear in the tread can be suppressed.
  • the hidden groove 52aH comprises the opening side portion 52aHa having the groove width maintained on the inner side in the tire radial direction (the groove depth direction) in the same manner as in the opening width W52aH in the tread surface 2. Consequently, the uneven wear in the tread around the internal resonator 5 can be more reliably inhibited.
  • the tire 1 comprises the external resonator 6 including, in the external land portion (in the present embodiment, the external intermediate land portion 42b) located in the vehicle-installed outside half portion HB to the tire equatorial plane CL among the plurality of land portions 4, the second auxiliary groove 61 that terminates in the external land portion 42b, and the second branch groove 62 (in the present embodiment, the second branch grooves 62a, 62b) that communicates between the second auxiliary groove 61 and the circumferential main groove 3 (in the present embodiment, the external circumferential main grooves 31b, 32b).
  • the external resonator 6 including, in the external land portion (in the present embodiment, the external intermediate land portion 42b) located in the vehicle-installed outside half portion HB to the tire equatorial plane CL among the plurality of land portions 4, the second auxiliary groove 61 that terminates in the external land portion 42b, and the second branch groove 62 (in the present embodiment, the second branch grooves 62a, 62b) that communicates
  • the air column resonance sound generated in the external circumferential main grooves 31b, 32b can be reduced by the external resonator 6, and hence the air column resonance sound generated in the tire can be reduced more than in the case where the internal resonator 5 is only provided in the tread surface 2.
  • the length L6 of the external resonator 6 in the tire circumferential direction is smaller than the length L5 of the internal resonator 5 in the tire circumferential direction.
  • a ground contact length of the tread in the vehicle-installed inside half portion HA is longer than that in the vehicle-installed outside half portion HB.
  • the length L6 of the external resonator 6 in the tire circumferential direction is smaller than the length L5 of the internal resonator 5 in the tire circumferential direction, and then the number of the external resonators 6 to be included in a contact patch increases. Consequently, the air column resonance sound can be further reduced.
  • the volume of the second auxiliary groove 61 of the external resonator 6 is smaller than the volume of the first auxiliary groove 51 of the internal resonator 5, and the number of the external resonators 6 to be arranged in the tire circumferential direction is larger than the number of the internal resonators 5 to be arranged in the tire circumferential direction.
  • the number of the external resonators 6 to be arranged in the tire circumferential direction is larger than the number of the internal resonators 5 to be arranged in the tire circumferential direction, and then the number of the external resonators 6 to be included in the contact patch increases, which is advantageous for further reduction of the air column resonance sound.
  • the volume of the second auxiliary groove 61 of the external resonator 6 is smaller than the volume of the first auxiliary groove 51 of the internal resonator 5, and then a uniform rigidity distribution in the tread can be achieved. Consequently, the uneven wear in the tread can be suppressed.
  • the tire 1 comprises at least two circumferential main grooves 3, and the groove width of the circumferential main groove on a vehicle-installed innermost side (in the present embodiment, the internal circumferential groove 32a) is maximum among the circumferential main grooves 3.
  • draining is efficiently performed through the internal circumferential main groove 32a provided on the vehicle-installed innermost side and having a maximum groove width, and hence, especially, a drainage performance during straight running can improve.
  • the circumferential main groove 3 in which the air column resonance sound is loud and which has a large groove width is disposed on the vehicle-installed innermost side, so that noise to outside can be minimized.
  • the hidden groove 52aH of the first branch groove 52a of the internal resonator 5 overlaps with the second auxiliary groove 61 of the external resonator 6 in the tire width direction.
  • the hidden groove 52aH in which high rigidity of the land portion can be maintained overlaps with the second auxiliary groove 61 in which the rigidity of the land portion is easy to decrease, in the tire width direction. Consequently, the rigidity distribution in the tread can be further uniform, and hence the uneven wear in the tread can be more reliably suppressed.
  • the hidden groove 52aH of the first branch groove 52a of the internal resonator 5 overlaps with the maximum width position of the second auxiliary groove 61 of the external resonator 6 in the tire circumferential direction, which is advantageous especially in effectively achieving the uniform rigidity distribution in the tire width direction.
  • the opening width of each of the first auxiliary groove 51 and the second auxiliary groove 61 in the tread surface 2 gradually increases from one end of each of the first auxiliary groove 51 and the second auxiliary groove 61 in the tire circumferential direction toward the maximum width position of each of the first auxiliary groove 51 and the second auxiliary groove 61, and gradually decreases from the maximum width position toward the other end of each of the first auxiliary groove 51 and the second auxiliary groove 61 in the tire circumferential direction.
  • the groove width of the central portion of each of the first auxiliary groove 51 and the second auxiliary groove 61 in the tire circumferential direction easily changes, and water that enters the first auxiliary groove 51 and the second auxiliary groove 61 can be efficiently discharged. Consequently, the drainage performance can further improve.
  • the groove depth of the first branch groove 52a of the internal resonator 5 is maximum in the hidden groove 52aH. Consequently, quietness (reduction effect of the air column resonance sound) is compatible with uneven wear resistance.
  • the tire 1 includes the groove deepest portion 51Dp in which the groove depth D51 in the first auxiliary groove 51 is maximum, in at least the central portion of the first auxiliary groove 51 of the internal resonator 5 in the extending direction. If the groove deepest portion 51Dp is provided, the groove volume of the auxiliary groove 51 can be easily acquired, and hence the drainage performance can further improve.
  • the groove deepest portion 51Dp is configured so that the depth of the first auxiliary groove 51 locally increases in the groove deepest portion 51Dp as in the tire 1 of the present embodiment, it is easy to maintain the rigidity of the land portion provided with the internal resonator 5 (in the present embodiment, the internal intermediate land portion 42a), and it is possible to more reliably suppress the uneven wear in the tread, as compared with a case where the groove deepest portion 51Dp is configured so that the depth of the first auxiliary groove 51 gradually decreases.
  • a ground contact width of the internal shoulder land portion 43a (a tire widthwise distance between contact ends of the contact patch when the tire is mounted to an applicable rim, filled with a prescribed internal pressure, and loaded with a maximum load) is smaller than a ground contact width of the internal intermediate land portion 42a.
  • a ground contact width of the external shoulder land portion 43b is smaller than a ground contact width of the external intermediate land portion 42b.
  • a ground contact width of the central land portion 41 among the plurality of land portions is minimum.
  • the groove width of the internal circumferential main groove 32a located on an outermost side in the tire width direction is maximum among the plurality of circumferential main grooves. This is because it is easy to increase a ground contact length on a vehicle-installed inner side during running, and such easiness noticeably contributes to a hydroplaning performance and can therefore effectively improve the hydroplaning performance.
  • an edge length per unit area of the external shoulder land portion 43b in the tire width direction is larger than an edge length per unit area of the internal shoulder land portion 43a in the tire width direction.
  • an edge length per unit area of the external intermediate land portion 42b in the tire width direction is larger than an edge length per unit area of the internal intermediate land portion 42a in the tire width direction.
  • an edge length per unit area in the tire circumferential direction it is preferable that an edge length per unit area of the internal shoulder land portion 43a in the tire circumferential direction is larger than an edge length per unit area of the external shoulder land portion 43b in the tire circumferential direction.
  • ground contact length can be optimized, the performance of the resonator can be more effectively exhibited, and the quietness can be further improved.
  • Example Tire and Comparative Example Tire (both had a tire size of 215/55R17) were experimentally produced under specifications illustrated in Table 1, and reduction effect of air column resonance sound (quietness) and uneven wear resistance were evaluated.
  • Each sample tire was assembled to a rim (7.5J) to form a tire wheel.
  • tire was applied with an air pressure of 230 kPa (an equivalent pressure) and a tire load of 4.46 kN and was run at a speed of 80 km/h on an indoor drum test machine, tire side sound was measured on conditions determined in accordance with JASO C606 standards. Then, a partial overall value in a 1/3 octave center frequency 800-1000-1250 Hz band was computed, and air column resonance sound was calculated.
  • Table 1 illustrates the results with a reduction amount (%) of the air column resonance sound to Comparative Example Tire 1. A larger percentage indicates a larger reduction amount of the air column resonance sound.
  • Each sample tire was assembled to a rim (7.5J) to form a tire wheel, and the tire was applied with an air pressure of 230 kPa (an equivalent pressure) and a tire load of 4.46 kN, and was run as much as 10000 km at a speed of 80 km/h on an indoor drum test machine. Afterward, a worn state of a tread surface was visually confirmed.
  • Table 1 illustrates the results. An uneven wear resistance of Comparative Example Tire 1 evaluated by an uneven wear amount was regarded as 10, and evaluation in ten stages was performed. A larger numeric value indicates more excellency in uneven wear resistance.
  • Each sample tire was assembled to a rim (7.5J) to form a wheel, and the tire was filled with an air pressure of 230 kPa (an equivalent pressure) and installed in a passenger vehicle. Afterward, the vehicle accelerated from a slow state in an evaluation course where water was sprayed over a paved road surface until a water depth reached 7 mm, and a vehicle speed when a slip rate of the tire reached 10% (a speed when the tire span on water) was obtained, to evaluate a drainage performance (a hydroplaning performance).
  • Table 1 illustrates the results.
  • the drainage performance of Comparative Example Tire 1 by the above vehicle speed was regarded as 100, and drainage performances of the other tires were indexed and evaluated. A larger numeric value indicates more excellency in drainage performance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
EP18889421.6A 2017-12-13 2018-12-10 Luftreifen Active EP3725556B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017239023 2017-12-13
PCT/JP2018/045347 WO2019117091A1 (ja) 2017-12-13 2018-12-10 空気入りタイヤ

Publications (3)

Publication Number Publication Date
EP3725556A1 true EP3725556A1 (de) 2020-10-21
EP3725556A4 EP3725556A4 (de) 2021-07-14
EP3725556B1 EP3725556B1 (de) 2023-09-06

Family

ID=66819269

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18889421.6A Active EP3725556B1 (de) 2017-12-13 2018-12-10 Luftreifen

Country Status (5)

Country Link
US (1) US11498370B2 (de)
EP (1) EP3725556B1 (de)
JP (1) JP7108633B2 (de)
CN (1) CN111448080A (de)
WO (1) WO2019117091A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3858642A1 (de) * 2019-11-12 2021-08-04 Hankook Tire & Technology Co., Ltd Reifen mit resonatoren zur geräuschreduzierung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7139288B2 (ja) * 2019-06-11 2022-09-20 株式会社ブリヂストン タイヤ
US20230219375A1 (en) * 2020-05-08 2023-07-13 Bridgestone Corporation Tire
WO2021225145A1 (ja) * 2020-05-08 2021-11-11 株式会社ブリヂストン タイヤ
EP4204200A1 (de) 2020-08-28 2023-07-05 Apollo Tyres Global R&D B.V. Nut unter einer lamelle

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS511061A (ja) 1974-06-21 1976-01-07 Mitsubishi Electric Corp Denryukirikaekairo
AT403456B (de) * 1993-05-18 1998-02-25 Semperit Ag Fahrzeugluftreifen mit einem laufstreifen
EP1964691B1 (de) 2005-12-21 2010-04-28 Bridgestone Corporation Luftreifen
JP5013731B2 (ja) * 2006-03-31 2012-08-29 株式会社ブリヂストン 空気入りタイヤ
CN101663176B (zh) * 2007-02-19 2012-02-08 株式会社普利司通 充气轮胎
FR2926037B1 (fr) * 2008-01-09 2009-12-18 Michelin Soc Tech Dispositif pour bande de roulement.
JP2010280266A (ja) * 2009-06-03 2010-12-16 Bridgestone Corp タイヤ
FR2966083B1 (fr) 2010-10-14 2012-10-26 Michelin Soc Tech Perfectionnement aux dispositifs attenuateurs de bruit pour pneu
JP5307215B2 (ja) * 2011-10-19 2013-10-02 東洋ゴム工業株式会社 空気入りタイヤ
JP2013126842A (ja) * 2011-12-19 2013-06-27 Bridgestone Corp 空気入りタイヤ
JP5507735B1 (ja) * 2013-04-25 2014-05-28 株式会社ブリヂストン 空気入りタイヤ
JP6043237B2 (ja) * 2013-04-25 2016-12-14 株式会社ブリヂストン 空気入りタイヤ
JP5981952B2 (ja) * 2014-03-07 2016-08-31 住友ゴム工業株式会社 空気入りタイヤ
JP5809305B2 (ja) 2014-03-11 2015-11-10 株式会社ブリヂストン 空気入りタイヤ
JP5852167B2 (ja) * 2014-04-04 2016-02-03 株式会社ブリヂストン タイヤ
JP2015214303A (ja) * 2014-05-13 2015-12-03 株式会社ブリヂストン タイヤ
JP6767149B2 (ja) * 2016-04-05 2020-10-14 株式会社ブリヂストン タイヤ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3858642A1 (de) * 2019-11-12 2021-08-04 Hankook Tire & Technology Co., Ltd Reifen mit resonatoren zur geräuschreduzierung

Also Published As

Publication number Publication date
EP3725556B1 (de) 2023-09-06
US20200298628A1 (en) 2020-09-24
CN111448080A (zh) 2020-07-24
US11498370B2 (en) 2022-11-15
JP7108633B2 (ja) 2022-07-28
JPWO2019117091A1 (ja) 2020-12-03
WO2019117091A1 (ja) 2019-06-20
EP3725556A4 (de) 2021-07-14

Similar Documents

Publication Publication Date Title
EP3725556B1 (de) Luftreifen
US10569603B2 (en) Pneumatic tire
EP3677440B1 (de) Reifen
EP3659826A1 (de) Reifen
EP2962872B1 (de) Luftreifen
US11491823B2 (en) Tyre for vehicle wheels
US20140311638A1 (en) Pneumatic tire
EP3769976B1 (de) Reifen
US11331957B2 (en) Pneumatic tire
US11077715B2 (en) Heavy-duty tire
US6474381B1 (en) Pneumatic tire including axial grooves
EP3061628B1 (de) Luftreifen
US20200298626A1 (en) Pneumatic tire
EP3590733B1 (de) Reifen
EP3640056B1 (de) Reifen
US20220203776A1 (en) Pneumatic tire
US20220153066A1 (en) Pneumatic tire
JP2009255753A (ja) 空気入りタイヤ
US11724549B2 (en) Pneumatic tire
US20180345729A1 (en) Pneumatic Tire
US20180345728A1 (en) Pneumatic Tire
EP3590732B1 (de) Reifen
EP4098460A1 (de) Luftreifen für schwereinsatz
EP3882053B1 (de) Luftreifen
JP6911560B2 (ja) 空気入りタイヤ

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20200529

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
A4 Supplementary search report drawn up and despatched

Effective date: 20210614

RIC1 Information provided on ipc code assigned before grant

Ipc: B60C 11/13 20060101AFI20210608BHEP

Ipc: B60C 11/00 20060101ALI20210608BHEP

Ipc: B60C 11/03 20060101ALI20210608BHEP

Ipc: B60C 11/12 20060101ALI20210608BHEP

Ipc: B60C 11/04 20060101ALI20210608BHEP

Ipc: B60C 19/00 20060101ALI20210608BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20220407

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

R17C First examination report despatched (corrected)

Effective date: 20220407

INTG Intention to grant announced

Effective date: 20230417

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230526

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602018057250

Country of ref document: DE

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20230906

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231207

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231206

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231207

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20231222

Year of fee payment: 6

Ref country code: DE

Payment date: 20231214

Year of fee payment: 6

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1608074

Country of ref document: AT

Kind code of ref document: T

Effective date: 20230906

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240106

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240106

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240108

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20230906